Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
December 28, 2010
Patent Application Number
11800479
Date Filed
May 4, 2007
Patent Citations Received
Patent Primary Examiner
Patent abstract
A source coil drive circuit section of an endoscope shape detection device includes, an oscillator that generates a sine wave and an amplifier that amplifies the sine wave and generates (drives) an alternating magnetic field to source coils through a switch section. The switch section is configured to switch a direct current to an output of the amplifier and supply to the source coils. In the source coil drive circuit section, a direct current resistance value detection section for measuring a direct current resistance value of the source coils by voltage drop when the switch section is supplying the direct current to the source coils is provided.
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